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Finding the Fourth Proportional to 994.59, 1,492.19 and 345.38

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Solution

The fourth proportional to 994.59, 1,492.19 and 345.38 is: 518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.59 : 1,492.19 = 345.38 : x
  2. Step 2: Convert to fraction form
    994.59/1,492.19 = 345.38/x
  3. Step 3: Cross multiply
    994.59x = 1,492.19 × 345.38
  4. Step 4: Simplify right side
    994.59x = 515,364.69
  5. Step 5: Solve for x
    x = 515,364.69/994.59
  6. Step 6: Final answer
    x = 518.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.